Wind turbine dome and method of assembly
An aerodynamic dome component that is placed in front of a wind turbine hub includes an outer ring, a central axle disposed relative to the outer ring, a plurality of radially extending tensioning members and a skin-like covering. The plurality of radially extending tensioning members are coupled to the outer ring at a first end and to the central axle at a second end. The outer ring, the plurality of radially extending tensioning members and the central axle together form an underlying dome support structure. The skin-like covering is configured to envelop at least a portion of the underlying dome support structure to form at least a portion of the aerodynamic dome component and define a front dome portion. The skin-like covering enveloping at least a portion of the underlying dome support structure may further define a rear dome portion, wherein the rear dome portion is configured downwind from the front dome portion.
1. An aerodynamic dome component for a wind turbine, the aerodynamic dome comprising:
an outer ring;
a central axle disposed relative to the outer ring;
a plurality of radially extending tensioning members responsive to a rotational force exerted thereon to increase or decrease tension of a respective radially extending tensioning member, each of the plurality of radially extending tensioning members coupled to the outer ring at a first end and to the central axle at a second end, wherein the outer ring, the plurality of radially extending tensioning members and the central axle together form an underlying dome support structure; and
a skin-like covering overlying at least a portion of the underlying dome support structure to form at least a portion of the aerodynamic dome component and define a front dome portion that provides blockage of an incoming wind flow and redirecting of the incoming wind flow about a periphery of the front dome portion.
2. The aerodynamic dome component according to claim 1 , wherein the skin-like covering overlying at least a portion of the underlying dome support structure further defines a rear dome portion, wherein the rear dome portion is configured downwind from the front dome portion.
3. The aerodynamic dome component according to claim 1 , wherein the skin-like covering is comprised of fabric, metal, polycarbonate, plastic, composite, a composite sandwich panel, or a combination thereof.
4. The aerodynamic dome component according to claim 1 , wherein the skin-like covering comprises a plurality of pie-shaped segments when viewed from a direction substantially orthogonal to an outermost surface of the skin-like covering.
5. The aerodynamic dome component according to claim 1 , wherein the skin-like covering, overlying at least a portion of the underlying dome support structure and defining the front dome portion further comprises one or more vent openings formed therethrough the skin-like covering and configured to remain closed when the incoming wind flow is not of sufficient strength to open the one or more vent openings and to permit the incoming wind flow to pass through the one or more vent openings when the incoming wind flow is of sufficient strength to open the one or more vent openings to minimize wind impact.
6. The aerodynamic dome component according to claim 1 , further comprising at least one of a bolt, a rivet, crimping, double-sided tape, a hook and loop element and a protrusion and slot structure coupling the skin-like covering to the underlying dome support structure.
7. The aerodynamic dome component according to claim 1 , wherein the outer ring comprises a plurality of ring segments.
8. The aerodynamic dome component according to claim 1 , further comprising a plurality of rotatable tension adjusters coupled to each of the plurality of radially extending tensioning members, wherein rotational movement of one of the plurality of rotatable tension adjusters or one of the plurality of radially extending tensioning members provides the increase or decrease in tension of the respective one of the plurality of radially extending tensioning members.
9. The aerodynamic dome component according to claim 1 , wherein the outer ring comprises at least one of a channel-frame cross-section structure, a box-frame cross-section structure, an I-beam structure, and combinations thereof.
10. The aerodynamic dome component according to claim 1 , wherein the plurality of radially extending tensioning members comprise a plurality of cables comprised of at least one of steel, carbon fiber and a high strength material.
11. An aerodynamic dome component for a wind turbine, the aerodynamic dome comprising:
a skin-like covering; and
an underlying dome support structure supporting the skin-like covering to define a front dome portion, the front dome portion providing blockage of an incoming wind flow and redirecting of the incoming wind flow about a periphery of the front dome portion, the underlying dome support structure comprising;
a central axle;
at least one outer ring segment disposed about said central axle; and
a plurality of radially extending tensioning members coupled to the at least one outer ring segment at a first end and to the central axle at a second end and configured to allow for an increase or decrease in tensioning of the radially extending tensioning members in response to a rotational force exerted on each of the plurality of radially extending tensioning members.
12. The aerodynamic dome component according to claim 11 , wherein the skin-like covering overlying at least a portion the underlying dome support structure further defines a rear dome portion, wherein the rear dome portion is configured downwind from the front dome portion.
13. The aerodynamic dome component according to claim 12 , wherein the front dome portion is larger than the rear dome portion.
14. The aerodynamic dome component according to claim 11 , wherein the skin-like covering, overlying at least a portion of the underlying dome support structure and defining the front dome portion, further comprises one or more vent openings formed therethrough the skin-like covering and configured to remain closed when the incoming wind flow is not of sufficient strength to open the one or more vent openings and to permit the incoming wind flow to pass through the one or more vent openings when the incoming wind flow is of sufficient strength to open the one or more vent openings to minimize wind impact.
15. The aerodynamic dome component according to claim 11 , wherein the skin-like covering comprises a plurality of pie-shaped segments when viewed from a direction substantially orthogonal to an outermost surface of the skin-like covering.
16. A method of assembling an aerodynamic dome component for a wind turbine, the method comprising:
providing a central axle;
interconnecting a plurality of arcuate ring segments to form an outer ring having one of a parabolic or semi-spherical outer shape disposed about the central axle;
coupling a plurality of radially extending tensioning members to the outer ring and the central axle to form an underlying dome support structure;
exerting a rotational force on one or more of the plurality of radially extending tensioning members thereby adjusting the tension of a respective radially extending tensioning member of the plurality of radially extending tensioning members to provide one of an increase or decrease of the tension; and
attaching via at least one of a bolt, a rivet, crimping, double-sided tape, a hook and loop element and a protrusion and slot structure a skin-like covering to the underlying dome support structure to form a front dome portion that provides blockage of an incoming wind flow and redirecting of the incoming wind flow about a periphery of the front dome portion.
17. The method according to claim 16 , wherein the step of attaching via at least one attachment mechanism, the skin-like covering to the underlying dome support structure further defines a rear dome portion, wherein the rear dome portion is configured downwind from the front dome portion.
18. The method according to claim 16 , wherein the skin-like covering comprises a plurality of pie-shaped segments when viewed from a direction substantially orthogonal to an outermost surface of the skin-like covering and wherein each of the plurality of pie-shaped segments is selected from a fabric material, a metal material, a composite material, a composite sandwich material and a combination thereof.
19. The method according to claim 16 , wherein the step of coupling a plurality of radially extending tensioning members to the outer ring and the central axle to form an underlying dome support includes coupling with a plurality of rotatable tension adjusters wherein rotational movement of one of the plurality of rotatable tension adjusters or one of the plurality of radially extending tensioning members provides the increase or decrease in tension of the respective one of the plurality of radially extending tensioning members.